Improvement in low-water indicators



` To all persons to 'whom these presents shall come:

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nLizA JOYCE, Or NEW YORK, N. Y."

l Lettw's Patent No. 83,638, alertedl November 3, 1868.

IMPROVEMENT IN LOW-.WATER IDICATRS.'

The Schedule referred to in these Letters Patent and making part of thesame.

Be it known that I, ELIZA JOYCE, now residing in thecity, county, andState of New York, have made a new and useful invention to be applied toa Steam- Boiler for the purpose of giving notice or warning when thewater thereof may become too low,- or at a dangerous level therein; andI do hereby declare the saine yto be fully described inthe followingspecification, and

represented in the accompanying drawings, of which-#J- Figure 1 is a topview, and v Figure 2 an endV elevation of it.

Figure?, is a longitudinal section of its float-spindle and screw forfixing the apparatus toa boiler.

Figure 4 is a section of a boiler with the invention applied to it.

Y This invention is intended to be applied to a boiler,

and at or about the level beyond which,- for the purposes of safety, therwater should not be suffered to fall therein,'my invention Abeing whatmaybe termed la low-water detector. i

In the drawings, A denotes a screw, having a hole,

a, bored through it longitudinally, such hole, atA its inner end, beingconical, or otherwise properly formed,

vas the seat fora valve, b, aiiixed to a spindle, B, which goes throughthe hole a, and is held in place therein by a Washeror head, c, fixed onthe spindle, near its outer end. 1 y

A crank or arm, el, extends from the innerend of the spindle, andsupports a float, C, fixed lirmly to it.

To the opposite end of the spindle, the elastic arm of a bell-hammer, D,is attache andprojected over a bell, E, and, with reference to t e stopsor studs' f g, in manneras exhibited in the drawings.

One of the stops is projected from the head, h, of

the screw A, and the other -from an arm, fl, which is extendedfrom thescrew, and serves to support the bell E, which -is connected to the armby a screw or pin, 7c, arranged as represented.

The stops f g are to prevent the float from being depressed below thelow-water level, or that` of the spindle.

In applying the apparatus to a boiler, the screw A is qto be screwedinto the shellof the boiler at or about at the low-water level, thecrank and the iloat being extended within the boiler.

*As the hammer and the Vbellwill be on the outside of theboiler, thewater, in falling to a dangerous level," or into proximity therewith,will, when in ebullition,

so vibrate the iloatas to ca use the hammer to make a series of blowsonthe bell, and thereby vgive'warning of the low state of the'water.' Theposition of the hammer will also serve to indicate the height of thewater inthe boiler. j

One of the advantages of this apparatus over various other low-waterdetectors in which a float is a compo-g nent part is, that its operationis not likely to be arrested by incrustations of saline or othermatters,

I claim the arrangement, in connection with the boiler, of the oat O andalarm'E, directly connected together by the crank-spindle B,substantially as d escribed, so that the ebullition of the water, whenat a determined level in tlieboiler, will effect the vibration of theoat, and the consequent sounding of the alarm,

asset forth.

' -g E. J OYCE.

Witnesses:

DANL JAMES Noves,

SAMUEL A. Noms.

